Pleasse document the fact that OTA uses UDP and not TCP

[seurat-atreides]

I would appreciate it if you documented the fact that OTA uses UDP instead of TCP.

[mcspr]

All updaters use TCP to actually upload the firmware.

Which UDP usage you want us to mention? There are at least two:

• ArduinoOTA initial connection happens using UDP, and then we switch to TCP (...bringing the server up on the client...)
• MDNS is used to advertise ArduinoOTA, it is not a requirement to run it

Also note there are HTTP server & client updaters, check out the built-in libraries examples